20137446432 has 36 divisors (see below), whose sum is σ = 57265864110. Its totient is φ = 6712482048.

The previous prime is 20137446431. The next prime is 20137446443. The reversal of 20137446432 is 23464473102.

20137446432 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 7 + 4 + 4 + 643 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14844010896 + 5293435536 = 121836^2 + 72756^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20137446431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34960557 + ... + 34961132.

Almost surely, 2^20137446432 is an apocalyptic number.

It is an amenable number.

20137446432 is an abundant number, since it is smaller than the sum of its proper divisors (37128417678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20137446432 is a wasteful number, since it uses less digits than its factorization.

20137446432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69921705 (or 69921694 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 20137446432 in words is "twenty billion, one hundred thirty-seven million, four hundred forty-six thousand, four hundred thirty-two".